478  
WHCA72 TJSJ 220800  
MWWSJU  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE SAN JUAN PR  
400 AM AST TUE APR 22 2025  
 
AMZ711-222200-  
/O.CON.TJSJ.SC.Y.0022.000000T0000Z-250423T0400Z/  
ATLANTIC WATERS OF PUERTO RICO AND USVI FROM 10 NM TO 19.5N-  
400 AM AST TUE APR 22 2025  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT AST  
TONIGHT...  
 
* WHAT...SEAS 6 TO 7 FEET, OCCASIONALLY TO 9 FEET.  
 
* WHERE...OFFSHORE ATLANTIC WATERS OF PUERTO RICO AND USVI.  
 
* WHEN...UNTIL MIDNIGHT AST TONIGHT.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
 
AMZ741-221600-  
/O.CON.TJSJ.SC.Y.0022.000000T0000Z-250422T1600Z/  
MONA PASSAGE SOUTHWARD TO 17N-  
400 AM AST TUE APR 22 2025  
   
..SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON AST TODAY
 
 
* WHAT...SEAS 5 TO 7 FEET, OCCASIONALLY TO 9 FEET.  
 
* WHERE...MONA PASSAGE.  
 
* WHEN...UNTIL NOON AST TODAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
 
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